Question: What is the instrument played by the instrumentalist with whom Taj Mahal and N. Ravikiran made Mumtaz Mahal?

Context paragraphs:
Mumtaz Mahal (album): Mumtaz Mahal is an album by American blues artist Taj Mahal, N. Ravikiran and Vishwa Mohan Bhatt.

Taj corridor case: The Taj Heritage Corridor case is an alleged scam wherein 2002–2003, the then Chief Minister of Uttar Pradesh Mayawati and a minister in her government, Nasimuddin Siddiqui, were charged with corruption.  The Taj Corridor project was intended to upgrade tourist facilities near the Taj Mahal and was to be implemented during her tenure as Chief Minister.  The then BJP government at the Centre gave the Environmental Clearance required for the project near Taj Mahal.  However, later on the BJP backed out and then started saying that the project was not cleared by the Environment Ministry and blamed Mayawati for starting construction work near the Taj Mahal.

Taj Mahal (1963 film): Taj Mahal is a 1963 film based on the historical legend of the Mughal emperor Shah Jahan.  As per the legend Shah Jahan created the Taj Mahal in fond remembrance and as a tomb for his beloved wife Mumtaz Mahal.

Black Taj Mahal: The Black Taj Mahal ("Black Taj", "Kaala Taj", also "the 2nd Taj") is a legendary black marble mausoleum that is said to have been planned to be built across the Yamuna River opposite the Taj Mahal in Agra, Uttar Pradesh, India.  Mughal emperor Shah Jahan is said to have desired a mausoleum for himself similar to that of the one he had built in memory of his third wife, Mumtaz Mahal.

Taj Mahal replicas and derivatives: The Taj Mahal, an iconic structure in India, has inspired numerous replicas and derivatives.  "The Taj", informally, is now a major tourist attraction in Agra, Uttar Pradesh, and has been regarded as one of the New Seven Wonders of the World.  Since 1632, when Mughal emperor Shah Jahan began building the Taj to house the tomb of his favorite wife, Mumtaz Mahal, it has inspired many notable replicas, and major derivative structures include a 1678-started project of the emperor's grandson.  Some are intended to be scale models or otherwise to be more or less faithful copies, and others are designed with mild or extreme interpretations of the Taj's architecture adapted to serve other purposes.

Vishwa Mohan Bhatt: Vishwa Mohan Bhatt, also known as V. M. Bhatt (born 27 July 1950), is Grammy-winning Hindustani classical music instrumentalist who plays the Mohan Veena (slide guitar).

Kester Smith: Kester "Smitty" Smith is an American percussionist.  He is the drummer for the Taj Mahal Trio and has collaborated with jazz, blues and world musicians.  He has performed with and alongside Taj Mahal for over forty years.  He has recorded music with Taj Mahal, Geoff Muldaur, Peter Rowan, Cedella Booker, Morgan Freeman, Ellen McIlwaine, Mary Coughlan and Pinetop Perkins.

R. Chandru: R. Chandru is a Kannada film writer and director.  He debuted with the successful 2008 film "Taj Mahal".  The huge success of "Taj Mahal" film, he popularly came to be known as Taj Mahal Chandru in the media.

Taj Mahal Bangladesh: Taj Mahal Bangladesh (Bengali: তাজ মহল বাংলাদেশ )is a scaled copy of the original Taj Mahal (a Mughal mausoleum located in Agra, India) located 10 miles east of the Bangladeshi capital, Dhaka in Sonargaon.  Unlike the original, work on the building took only five years.  Ahsanullah Moni, a wealthy Bangladeshi film-maker, announced his 'Copycat version of Taj Mahal' project in December 2008.  The project cost about USD$56 Million, and was built 20 miles northeast of Capital Dhaka.  Moni has explained that he built a replica of the Taj Mahal so that the poor of his nation can realise their dream of seeing neighbouring India's famed monument.  This caused complaints from Indian officials, "You can't just go and copy historical monuments" an official of Indian High Commission in Dhaka told press.

Taj Mahal, Bulandshahar: Taj Mahal or Mini Taj Mahal or Qadri's Taj Mahal, officially known as Maqbara Yadgare Mohabbat Tajammuli Begum is a replica of the historic Taj Mahal of Agra located in Kaser Kalan, a small village in Bulandshahar of Uttar Pradesh, India.  It was built by 81 years old a retired postmaster, Faizul Hasan Qadri in the memory of his dead wife Tajamulli Begum, who died due to throat cancer in 2011.

Supporting paragraphs: Mumtaz Mahal (album) Vishwa Mohan Bhatt
Answer: Mohan Veena (slide guitar)