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There are lots of varieties of mangoes

They belong to protein group :)

They come from mainly Asian continent

Mainly green leafy vegetables have lots of Iron in them and other than these Iron is present in nuts and dry fruits

Advantage is like you can perform huge calculations at a time

All green vegetables are a good source of proteins but I would suggest you to opt for to dairy products for getting proteins

I think they are seeds

Contains lots of Fats...

They can sell healthy food alternates

It is present in milk and you can also get vit D by siting in sun light for some time

Of course yes you can

It depends on the size of Lemon

Means you r a naughty person

When a fruit comes in direct contact with oxygen it starts reacting to it and starts spoiling!

It is a fleshy fruit containing a big seed inside and it is very sweet in taste!

Squeezing lemon over it or sprinkling salt over it

Yes I have also heard this fact but don't have solid proof :)