The incorrect sentence is:
C: "The only problem is that the wickets that are on offer for domestic cricket are hardly conducive for batsman."
The term "batsman" should be pluralized to "batsmen" since it refers to multiple players.
A corrected version could be: "The only problem is that the wickets that are on offer for domestic cricket are hardly conducive for batsmen."
The correct option is (C): The only problem is that the wickets that are on offer for domestic cricket are hardly conducive for batsman.