Question: What was the name of the first single released by the Australian hard rock band, formed in Sydney in 1973 by brothers Malcolm and Angus Young?
Context: Let There Be Rock is an album by Australian hard rock band AC/DC.  It was the band's third internationally released studio album and the fourth to be released in Australia.  All songs were written by Angus Young, Malcolm Young and Bon Scott.  It was originally released on 21 March 1977 in Australia on the Albert Productions label.  A modified international edition was released on 25 July 1977 on Atlantic Records. "Let's Get It Up" is a song by Australian hard rock band AC/DC, first released on their 1981 album "For Those About to Rock We Salute You", and later as its first single. "Whole Lotta Rosie" is a song by Australian hard rock band AC/DC.  It is the eighth and final track on the band's fourth Australian album, "Let There Be Rock", released in Australia in March 1977, and was written by Angus Young, Malcolm Young, and Bon Scott.  It is also the eighth and final track on the international version of the album, released in June the same year. "Rock or Bust" is the second single and first track from the album of the same name by Australian hard rock band AC/DC.  It was written by Angus Young and Malcolm Young.  It was released for downloads on 17 November 2014, as a follow-up for the band's first officially released single from the album titled "Play Ball". "Can I Sit Next to You, Girl" is the debut single by Australian hard rock band AC/DC issued on 22 July 1974.  On August 26, 1974, the song peaked at number 50 on the Aria charts and then disappeared.  This version has lead vocals performed by Dave Evans prior to his being replaced by Bon Scott, as well as drums by ex-Masters Apprentices member Colin Burgess and bass guitar by ex-The Easybeats member George Young (older brother of band cofounders Malcolm Young & Angus Young; co-producer).  Originally, AC/DC's first bassist, Larry Van Kriedt, played the bass parts, but George recorded his own over them later.  In 1975, after Scott joined, the group re-wrote and re-recorded the song as the seventh track on their Australia-only album "T.N.T.", released in December 1975 (see 1975 in music), and as the sixth track on the international version of "High Voltage", released in May 1976.  The title of this version of the song removed the comma, becoming "Can I Sit Next To You Girl". "Guns for Hire" is a song by Australian hard rock band AC/DC, from their album "Flick of the Switch", released on 15 August 1983.  Written by band members, Angus Young, Malcolm Young and Brian Johnson, it was also released in August as a single with "Landslide" as the B-side.  It charted at No. 37 on the UK Singles Chart, and No. 84 on the United States "Billboard" Hot 100.  It also reached No. 19 in Ireland. AC/DC are an Australian hard rock band, formed in Sydney in 1973 by brothers Malcolm and Angus Young.  A hard rock/blues rock band, they have also been considered a heavy metal band, although they have always dubbed their music simply "rock and roll". AC/DC are a hard rock band formed in Sydney, Australia in 1973 by brothers Angus and Malcolm Young.  Although the band are considered pioneers of heavy metal, its members have always classified their music as "rock 'n' roll".  AC/DC underwent several line-up changes before releasing their first album, "High Voltage", in 1975.  Membership remained stable until bassist Cliff Williams replaced Mark Evans in 1977.  In 1979, the band recorded their highly successful album "Highway to Hell".  Lead singer and co-songwriter Bon Scott died on 19 February 1980, after a night of heavy alcohol consumption.  The group briefly considered disbanding, but soon ex-Geordie singer Brian Johnson was selected as Scott's replacement.  Later that year, the band released their best-selling album, "Back in Black".  The band's next album, "For Those About to Rock We Salute You", was also highly successful and was their first album to reach number one in the United States.  AC/DC declined in popularity soon after the departure of drummer Phil Rudd in 1983.  Poor record sales continued until the release of "The Razors Edge" in 1990.  Phil Rudd returned in 1994 and contributed to the band's 1995 album "Ballbreaker". " Stiff Upper Lip" was released in 2000 and was well received by critics.  The band's new album "Black Ice" was announced in June 2008 and was released on October 20, 2008.  The album's first single, "Rock 'N Roll Train", earned AC/DC a Grammy nomination for Best Rock Group or Duo with Vocals.  Another "Black Ice" track, "War Machine," gained AC/DC their first Grammy Award win, for Best Hard Rock Performance. George Redburn Young (born 6 November 1946) is an Australian musician, songwriter and record producer.  Born in Scotland, he moved to Australia with his family as a teenager, and became a naturalised citizen.  He is best known as a member of the 1960s Australian rock band the Easybeats, and as a co-writer of the international hits "Friday on My Mind" and "Love Is in the Air", the latter recorded by John Paul Young (no relation).  Young was also the producer of some work by the Australian hard rock band AC/DC, formed by his younger brothers Malcolm and Angus Young. AC/DC are an Australian hard rock band formed by guitarist brothers Angus and Malcolm Young in 1973.  Originally featuring vocalist Dave Evans, bassist Larry Van Kriedt and drummer Colin Burgess, after a number of lineup changes the band settled with Bon Scott on vocals, Mark Evans on bass guitar and Phil Rudd on drums, and released five albums (two limited to Australia) between 1974 and 1977.  Due to continuing clashes with lead guitarist Angus Young, Evans was later fired from the band shortly after the release of "Let There Be Rock", although "musical differences" was the official reason given for his departure.  Cliff Williams was brought in as his replacement.
Answer: "Let's Get It Up"