beryllium & calcium are the two in the same column or family
2 => 6 meters = 600cm
3 => 70 quarts = 17.5 gallon
50 inches = 1.5 meters
2,000 grains = 4.57 ounces
7 tablespoons = 0.027344 gal
Alpha particles are helium nucleus ! so answer is A !
it is made by ionization of helium, when both the electrons are out , then two unit of positive charge is one helium and thus called alpha particle !