Assertion (a): Ethyne is widely used for cutting and welding iron and steel.
Reason (r): Ethyne is an unsaturated hydrocarbon involving carbon-to-carbon triple bond.
What is the correct statement regarding the use of ethyne for cutting and welding iron and steel?
1) Both assertion (a) and reason (r) are true, and reason (r) is the correct explanation of assertion (a).
2) Both assertion (a) and reason (r) are true, but reason (r) is not the correct explanation of assertion (a).
3) Assertion (a) is true, but reason (r) is false.
4) Assertion (a) is false, but reason (r) is true.
