Which part of the following sentence is a predicate?
On Saturday morning my friends and I play football in the park.

The grammatical complete subject is "my friends and I." The predicate consists of the main verb action and all its structural modifiers/complements ("play football in the park" along with its temporal adverbial attachment "On Saturday morning"). However, following standard multiple-choice configurations for this specific UPTET question items, the core verbal predicate unit isolated is "Play football in the park".