For persons, who/that should be used as Relative Pronoun. Hence, The children who/that are assembled is the right usage.

Correct Option: A

For persons, who/that should be used as Relative Pronoun. Hence, The children who/that are assembled is the right usage.

Here, Gerund i.e. and confidence as dancing is the right usage.

Correct Option: C

Here, Gerund i.e. and confidence as dancing is the right usage.

The sentence is in Past Tense and childlike is the right usage. childlike (Adj.) : having the qualities that children usually have childish (Adj.) : typical of a child ; immature. Hence, they found he had a childlike simplicity is the right usage.

Correct Option: B

The sentence is in Past Tense and childlike is the right usage. childlike (Adj.) : having the qualities that children usually have childish (Adj.) : typical of a child ; immature. Hence, they found he had a childlike simplicity is the right usage.

When we use Neither - nor, the Verb agrees according to the Number/Person of the nearest Subject. Here, the colour is a Singular Subject. Hence, was (Singular Verb) right is the right usage.

Correct Option: C

When we use Neither - nor, the Verb agrees according to the Number/Person of the nearest Subject. Here, the colour is a Singular Subject. Hence, was (Singular Verb) right is the right usage.

Here, the group is a Singular Subject. Hence, Singular Verb i.e.was not competent to do the job efficiently is the right usage.

Correct Option: C

Here, the group is a Singular Subject. Hence, Singular Verb i.e.was not competent to do the job efficiently is the right usage.