Identify the most appropriate word which is similar to the underlined word in the following sentence:

The first day at the new school is always a MOMENTOUS day for the students.

Choose the correct synonym of the word: Ostentation

Replace the underlined word with the most appropriate synonym: John found himself frequently stumped by the kind of questions his 3-year-old son asked.

Choose the correct synonym for the underlined word from the options given:

Incongruity

Identify the word that is closest in meaning to the word - $\text{Relegate}$

Choose the correct synonym for the word: Inequitable

Choose the correct synonym of the following word: OSTRACISE