England, in spite of losing a Test against minnows Bangladesh inside three days before arriving here, will start the series from November 9 in Rajkot.
World No.1 India have not lost a home series since going down 1-2 in 2012 to the England led by the 31-year-old Cook.
"It's a big challenge. Any time you play the No. 1 or the No. 2 ranked team in their backyard, who are very comfortable in their conditions, it's a huge task for us. It's a huge challenge to these guys who have not played a huge amount of cricket in the subcontinent as a group," said Cook.
"These are different conditions, but being underdogs takes a lot of pressure off us," said the Lancashire player who has a superb record against India.
"We have got some big selection calls to make but the process has started like always when you know two games (in Bangladesh) have happened," said Cook, who has scored four centuries and averages over 60 in eight Tests on Indian soil and 54 in 20 Tests overall.
"I remember saying in the press conference after the first Test when talk was India will win 4-0 that we might turn around and win 3-1. Anything is possible.
(Reopens BOM4)
Comparing the bowling attack of 2012, that had Graeme Swann and Monty Panesar as the spin options, to the current one, Cook said they have more balance now and can even afford to include six bowlers.
"Unfortunately we don't have that experience, but we have got guys who were successful against India in the past. We have more options in this squad and the balance of the side allows us to have six bowlers," said Cook.
The touring side has four tweakers to choose from in off spinners Moeen Ali and Gareth Batty, left arm spinner Zafar Ansari and leg spinner Adil Rashid.
Head coach Trevor Bayliss said it would be a folly to focus only on a few individuals from India such as captain Virat Kohli and premier spinner R Ashwin and ignore the rest of the home team members.
"Look, both are very good players. But if we concentrate on just one or two of their players its a wrong way to go about it. They have got more than two good players. We are worried about what we are doing. We have to make sure we bat and bowl well against all the Indian players."
"It's a tough selection call. We have a number of options. But until we get there and see how the wicket is we will not be able to decide on it (team combination). We are not going to make any judgement right now.
