Chemical Process
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

All of these
Greater tendency of decomposition at elevated temperature
Hydrolysis tendency in presence of water
Poor oxidation stability and high gum forming tendency

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Chemical Process
Transparent soaps (e.g. Pears) are

Metallic soaps with frothing agent from which glycerine has not been recovered
Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
None of these
Metallic soaps with frothing agent and free stearic acid to achieve transparency

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