The correct option is A Muslim League provided an opposition to the Congress.
Muslim League was formed under the leadership of Sir Aga Khan, the Nawab of Dhaka and Nawab Mohsin-ul-Mulk to the notion to safeguard the rights of Muslim people. Initially it got support from the British as the former adopted the policy of opposition to Congress. British wanted to divide India on communal lines so they provided separate electorate to Muslims through Morley-Minto reforms.