Explanation

The phrase "But for my life" is an idiomatic expression meaning "no matter how hard I try."

In the given sentence, it implies that the speaker was unable to drink the milk despite trying.

Explanation

The refractive index of glass typically ranges from 1.5 to 1.9, depending on the type of glass.

Standard crown glass has a refractive index of approximately 1.5.

Explanation

The Aryans migrated and settled in the North-Western regions of the Indian subcontinent around 1500 BCE.

This area includes present-day Pakistan and northwestern India, where the early Vedic civilization developed.

Explanation

Both senses detect chemicals—smell through the nose and taste through the tongue.

They work together to enhance flavor perception.

Explanation

On February 20, 1947, Attlee announced that British rule in India would end no later than June 1948.

This declaration set the timeline for India's independence.

Explanation

Valency is the number of electrons an atom can gain, lose, or share to achieve a stable configuration.

Carbon (C) has an atomic number of 6, with an electron configuration of 2,4.

It needs 4 more electrons to complete its outer shell (octet rule), so its valency is 4.

Explanation

Mali and Haiti are classified as underdeveloped countries due to their low economic growth, poor infrastructure, and high poverty rates.

They struggle with political instability, weak healthcare systems, and limited industrialization.

Explanation

The sentence follows the active voice structure, where the subject (All my certificates) performs the action (are attached).

In passive voice, it would be restructured as: All my certificates have been attached herewith.

Explanation

The sentence requires a reflexive pronoun (e.g., myself, herself, itself) to show that the subject ("She") is the object of her own anger.

"Herself" is the correct reflexive pronoun matching the subject "She."

Explanation

The train had already left the station.

The sentence follows correct subject-verb-object order: "The train" (subject) + "had already left" (verb) + "the station" (object).

It uses past perfect tense properly to show that the action (train leaving) was completed in the past.