Correct Answer: (c) Each of Andhra Pradesh and Karnataka
Solution:Both Andhra Pradesh and Karnataka shares boundaries with maximum number of Indian states.
Karnataka's bordering states: Maharashtra, Goa, Telangana, Andhra Pradesh, Tamil Nadu, and Kerala.
Andhra Pradesh's bordering states: Odisha, Chhattisgarh, Telangana, Karnataka, and Tamil Nadu.
Uttar Pradesh: shares its boundary with nine Indian states and one union territory: Rajasthan, Haryana, Himachal Pradesh, Delhi, Uttarakhand, Bihar, Madhya Pradesh, Jharkhand, and
Chhattisgarh.