World Geography
Which among the following statements is/are correct about Smog?It is formed in urban and industrial areas.It is formed when smoke is mixed with fogSelect the correct code from the options given below:

Both 1 & 2
Neither 1 & 2
Only 1
Only 2

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World Geography
Which among the following region has the highest density of rail network?

South east Asia
Western Europe
North America
Eastern Asia

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