As we know that ,
The word ‘backed out’ means go back on or withdraw from.

Correct Option: A

As we know that ,
The word ‘backed out’ means go back on or withdraw from.
The correct word is filled in the above given sentence :-
He lost confidence and backed out of the deal at the last minute.
Hence , correct word is option A .

As we can say that ,
War is a negative word and it is synonym with mass destruction, death hence certainly has grim consequences. Happy, Pleasing, exciting all have positive sense; so can not be linked with war.

Correct Option: C

As we can say that ,
War is a negative word and it is synonym with mass destruction, death hence certainly has grim consequences. Happy, Pleasing, exciting all have positive sense; so can not be linked with war.
The correct word is filled in the above given sentence :-
We have not yet fully realised the grim consequences of the war.So , required answer will be option C .

Note that the paralytic attack was mild, which gives us the clue that its effect would be slight. This is further substantiated by the second part of the sentence:” …otherwise he is still very active” means there is some (slight) trouble but not much.

Correct Option: B

Note that the paralytic attack was mild, which gives us the clue that its effect would be slight. This is further substantiated by the second part of the sentence:” …otherwise he is still very active” means there is some (slight) trouble but not much.
The correct word is filled in the above given sentence :-
After a recent mild paralytic attack his movements are slightly restricted; otherwise he is still very active.So , required word will be option B .

As we know that ,
If you are the cynosure of all eyes, you are a centre of attention or interest.
The correct word is filled in the above given sentence :-
That charming girl was the cynosure of all eyes.

Correct Option: B

As we know that ,
If you are the cynosure of all eyes, you are a centre of attention or interest.
The correct word is filled in the above given sentence :-
That charming girl was the cynosure of all eyes.
So , required word will be option B .

As we can say that ,
If A transmits a disease to B, A has the disease and causes B to have it. Here, “disease” gives us the clue.
The correct word is filled in the above given sentence :-
AIDS is not a disease that can be transmitted through the air or by insects.

Correct Option: C

As we can say that ,
If A transmits a disease to B, A has the disease and causes B to have it. Here, “disease” gives us the clue.
The correct word is filled in the above given sentence :-
AIDS is not a disease that can be transmitted through the air or by insects.
Hence , option C is correct word .