Explanation:

- Supreme Court Observation: In January 2021, the Supreme Court emphasized that reservations for Other Backward Classes (OBC) cannot surpass 50% of the total seats.

- Option: 1 - State of Madhya Pradesh: This state was not directly involved in the particular case regarding the 50% cap observation around this period.

- Option: 2 - State of Maharashtra: This option is correct. The case specifically involved Maharashtra, where the court made the observation concerning the reservation limit.

- Option: 3 - State of Goa: Similar to Madhya Pradesh, Goa was not a party in this particular case related to the reservation cap at that time.

- Option: 4 - State of Telangana: Telangana also wasn't directly relevant to the Supreme Court's decision surrounding the 50% cap in January 2021.