World Geography
Which among the following statements is/are correct about Petroleum?Petroleum is an inflammable mixture of oily hydrocarbons.Most of the oil comes from synclines rather than anticlines.Select the correct code from the options given below:

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

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World Geography
The relative abundance of dissolved salts in seawater in descending order is as follows

chlorine, magnesium, calcium, sodium, potassium, sulphate
sodium, chlorine, magnesium, potassium, sulphate, calcium
chlorine, sodium, magnesium, calcium, potassium, sulphate
chlorine, sodium, sulphate, magnesium, calcium, potassium

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