Choose the appropriate code of Assertion and Reason:Assertion A: Revolutionary Movement failed to make any big dent in British hold over India.Reason R: The movement lacked centralised leadership and coordination among various groups.Codes:

• A. Both A and R are false.
• B. Both A and R are true and R substantiates A.
• C. A is false and R is true and R do not substantiate A
• D. R is true and A is false.