Learn English – Since with had been (the past perfect tense)

When talking about a national sports term, rather than a country, it's not unusual (in British English, at least), to use the plural. This is because a team is regarded as a group of people, whereas a country is not (companies also tend to use the plural; see also here).

So:

India have 11 players on the pitch.

suggests that we're talking about an Indian sports team.

Compare:

India has a population of 1.2 billion.

which implies we're talking about the country.

When referring to any sort of jeans or pants in English, one of them is always "a pair". No fluent American English speaker says "a bluejeans" or "a pants".

You can say, "I wore a pair of bluejeans." Or you can say, "I wore bluejeans." But you can't say -- WRONG -- "I wore a bluejeans."

This is true for any clothing worn over the legs that has separate tubes of cloth for each leg, even though they are connected together. "A pair of pants ..." "A pair of shorts ..." "A pair of panty hose ..." Perhaps weirdly, it is also used for clothes that don't have separate legs, like "a pair of underwear" and "a pair of panties". But it is not used for skirts or dresses: We say "a skirt". "A pair of skirts" would mean two separate articles of clothing. Which is kind of funny when you think about it, but whatever.

If, as @oerkelens says, the usage is different in India -- I wouldn't know.