But-2-yne and hydrogen (one mole each) are separately treated with (i) Pd/C and (ii) Na / liq. to give the products X and Y respectively. [2026]

Identify the incorrect statements.
A. X and Y are stereoisomers.
B. Dipole moment of X is zero.
C. Boiling point of X is higher than Y.
D. X and Y react with to give different products.
Choose the correct answer from the options given below:
(1)
