Hi
Abdullateef Abdulsalam Answers to your problem are:
C) invt = grts;
F) grts = new float[1][4];
G) invt = new float[4][2];
because
prct is one dimensional Array Object type reference
invt, grts, sms are two dimensional Array Object type reference
hms is three Array Object type reference
Now, I think these statements will clear your doubts..
And you can easily make out why other options will cause compile-time errors..