Question: What metro are both the Magenta line and Palam metro line part of? 
Context: The Harbor Transitway is an 11 mi shared-use bus corridor (transitway) and high-occupany toll roadway that runs in the median of Interstate 110 (Harbor Freeway) in Southern California.  The main bus service operating on the busway is the Metro Silver Line which was introduced on December 13, 2009.  The Metro Silver Line bus rapid transit line runs on the Harbor Transitway from Harbor Gateway Transit Center to Downtown Los Angeles and continues to El Monte Bus Station.  The line operates daily with frequent service.  In addition to Metro Silver Line, other Metro bus and municipal bus routes also operate on the Harbor Transitway.  They include Metro Express lines 442, 460 and 550, Torrance Transit line 4, Gardena Transit line 1X and Orange County Transportation Authority lines 701, 721.  Metro Express lines 442 and 550 operate only during weekdays peak hours.  Metro Line 442 operates peak a.m. northbound only and southbound p.m. only.  Torrance Transit line 4, Gardena Transit line 1X, and Orange County Transportation Authority: 701, 721 operate only during weekday peak hours.  Metro Express line 460 operates daily along with the Metro Silver Line.  Busway bus lines originate from Downtown Los Angeles and El Monte, with final destinations in Disneyland, and Disney California Adventure Park located in Anaheim, Knott's Berry Farm, Artesia, Fullerton, Gardena, Hawthorne, Huntington Beach, San Pedro and Torrance. The Botanical Garden (Hindi: बॉटानिकल गार्डन ) is a metro station on the Blue Line of the Delhi Metro.  Under phase 3 Delhi metro Magenta line will connect to botanical garden and became a terminal station on one other.  And On the other end it terminate on janakpuri west, blue line.  And soon line going to be operational by March 2017, with the trial starting on this section on November 2016. The Magenta Line (Hindi: मैजेंटा लाइन ) is one of the under-construction lines of the Delhi Metro, a rapid transit system in Delhi, India.  It consists of 25 metro stations from Janakpuri West to Botanical Garden.  The Magenta Line will provide direct connectivity to Terminal 1D of Indira Gandhi International Airport.  The upcoming Hauz Khas station on this line and the current Yellow Line will be the deepest Metro station at a depth of 29 metres, surpassing the record set by Chawri Bazaar station currently on the Yellow Line, at a depth of 22 metres. Zhengzhou Metro () is a rapid transit metro rail network serving urban and suburban districts of Zhengzhou municipality.  The plans of Zhengzhou Metro line 1 and Zhengzhou Metro line 2 were approved by National Development and Reform Commission (NDRC) in February 2009.  Construction of Line 1 started on 6 June 2009.  Line 2 started construction on 28 December 2010.  As planned, Line 1 commenced services on 26 December 2013 and Line 2 commenced services on 19 August 2016.  In January 12, 2017, the southern extension of Line 2 allows the system to serve the Xinzheng International Airport.  It is the first and currently the only metro system in the Henan Province. The Palam (Hindi: पालम ) metro station is located on the Magenta Line of the Delhi Metro. Darvaze Shemiran Metro Station is the junction of Tehran Metro Line 2 and Tehran Metro Line 4.  It is located in junction of Baharestan Street and Mazandaran Street and Namjou Street nad Sepah Street.  It is between Imam Hossein Metro Station and Baharestan Metro Station in Line 2 and Meydan-e Shohada Metro Station and Darvazeh Dowlat Metro Station in Line 4. Line 3 of the Mumbai Metro, also referred to as the Colaba–Bandra-SEEPZ line, is a part of the metro system for the city of Mumbai, India of which construction has been initiated.  When completed, the 33.5-km long line will be the first underground metro line in Mumbai.  The metro line will connect Cuffe Parade business district in the extreme south of the city to SEEPZ in the north-central with 26 underground and one at-grade station.  The track width is standard gauge.  The cost of this corridor is estimated at () .  Line 3 is expected to reduce road congestion, besides reducing the load on the Western Line between Bandra and Churchgate. Gupo Station is a station on the Gyeongbu Line and Busan Metro Line 3.  It is located in northern Busan, South Korea, and was opened on 1 January 1905.  All kinds of trains stop here.  It is also connected with the subway station Gupo Station on Busan Metro Line 3 via an overhead bridge, so passengers can transfer to Busan Subway Line 3.  All trains on Busan Metro Line 3 call at this station. Tehran (Sadeghiyeh) Metro Station is the junction of Tehran Metro Line 2 and Tehran Metro Line 5.  It is located in Sadeghiye neighborhood near Mohammad Ali Jenah Expressway and Tehran-Karaj Freeway.  It is the west end of Line 2 and the east end of Line 5.  The next station in Line 2 is Tarasht Metro Station and the next station in Line 5 is Eram-e Sabz Metro Station.  It also has a big parking lot and is considered as the most crowded Tehran metro station. Darvaze Dowlat Metro Station is the junction of Tehran Metro Line 1 and Tehran Metro Line 4.  It is located in the junction of Enghelab Street, Saadi Street and Dr. Mofatteh Street.  It is between Panzdah-e-Khordad Metro Station and Saadi Metro Station in Line 1 and Mellat Metro Station and Hasan Abad Metro Station.  This station is a crowded station because it has connections to Tarbiat Modares University, Ferdowsi Shoe Bazar, Enghelab Book Bazar and Tehran Bus BRT1.
Answer: Delhi Metro