‘Ka-ching’ Credit Card--By KMBL and IndiGo Airlines

Current Context: The Kotak Mahindra Bank (KMBL) and IndiGo airlines have launched ‘Ka-ching’ which is a co-branded credit card.

• It was launched under IndiGo’s 6E rewards program.
• It will be launched in November 2021.
• The card will offer exclusive travel benefits to members.
• The ‘Ka-ching’ co-branded credit card will be available in two variants, namely 6E Rewards, and 6E Rewards XL.
• The cardholders will be benefited during domestic and international travel.
• They can earn additional 6E rewards on dining, shopping, transport, medical bills, utilities, and fuel.
• The cardholders can get accelerated with 6E Rewards on their spending.
• They can redeem these points for airline tickets anytime with no blackout dates on redemptions.
• They can also earn complimentary air tickets, discounts on convenience fees, priority check-in, choice of seats, and a complimentary meal using the card.
• Static Part: 
• HQ of KMBL: Mumbai
• HQ of IndiGo: Gurugram, Haryana

Question: 

Q.1 In partnership with which bank has IndiGo Airlines launched Ka-ching’s co-branded credit card?
a. HDFC Bank
b. Axis Bank
c. Kotak Mahindra Bank
d. Yes Bank