Explanation: The Upanishads are philosophical texts that explore the concepts found in the Vedas and are associated with the later Vedic period.

Explanation: Indra was considered the chief deity during the early Vedic period, associated with thunder, rain, and war.

The correct answer is under suspicion. Key Points. The idiom "Under a cloud" means one is under suspicion of doing something fishy. Hence the correct option for the idiom "under a cloud" is "under suspicion".

The correct answer is 'went to bed'. To Hit the sack means to go to bed. After the long journey, he hit the sack as soon as he reached home.

Explanation: The Rigveda is the oldest and most important text of the Vedic period, consisting of hymns dedicated to various deities.

The most appropriate meaning of the given idiom "In queer street" is "In debt." In queer street: in trouble, usually because of debt. Example: He will be in the queer street if he continues buying expensive things.

The idiom, 'to be in the doldrums' means 'to be depressed, low spirited or sluggish'. The use of the idiom can be seen in the following sentence: Harry has been in the doldrums ever since he lost his job as a print journalist.

The correct answer is- a positive outlook on life. Let's look at the meaning of the given idiom: Rose-coloured glasses- the tendency to see things in a positive light.