Directions: Identify which part of the given sentence contains a grammatical error. Of all the players it was Ramesh who plan his tactics with utmost care.

Step-by-step solution

The sentence is in the past tense, as indicated by the phrase "it was Ramesh". Therefore, the verb following the relative pronoun "who" must also be in the past tense to maintain consistency. The verb "plan" should be replaced with "planned". The correct sentence is: "Of all the players it was Ramesh who planned his tactics with utmost care." Hence, the error lies in the part "who plan his tactics".