Which of the following statements is correct?
| A. |
aluminium carbide as well as beryllium carbide produce methane gas on treatment with water |
| B. |
on reacting with water, calcium carbide `(CaC_2)` produces acetylene while magnesium carbide `(Mg_2C_3)` gives propyne |
| C. |
both of these |
 |
| D. |
non of these |