What is the antonym of the word '$pernicious^{\prime}$

1.Fill in the blank with the most appropriate option. Even though the former boss has always been rude with me, I do not hold any more — against him.

2.Fill in the blank with the most appropriate option. The CEO suddenly resigned — rumors of misconduct.

3.Fill in the blank with the most appropriate option. The verb form of the word '$prison^{\prime} is$ —.

4.Fill in the blank with the most appropriate option. The — of the moon on the river never fails to amaze us.

5.Fill in the blank with the most appropriate option. Nuclear energy is — dangerous to be used widely.

6.Fill in the blank with the most appropriate option. Arriving late at a meeting is rude, and shows — other people's time.

7.Fill in the blank with the most appropriate option. If his friend had not helped him, Arif — it really difficult to complete the assignment.

8.Fill in the blank with the most appropriate option. For myself, I chose the cheapest dish on the menu — mutton chop.

9.Fill in the blank with the most appropriate option. Raha will be going to the US, — she?

10.Fill in the blank with the most appropriate option. Those who are vulnearable are —.

11.Which of the following words has been properly spelled?

12.She says, "I had a headache yesterday." Which of the following is its indirect speech form?