One of the following options is correct to call number via intent:

a$.$

Uri number $=$ Uri.parse$("$geo:$5551234")$;

Intent $i=$ new Intent$($Intent$.$ACTION$\_$VIEW, number$)$;

startactivity$($i$)$;

b$.$

Uri number $=$ Uri.parse$("$tel:$5551234")$;

Intent $i=$ new Intent$($Intent$.$ACTION$\_$DIAL, number$)$; startActivity$($i$)$;

c$.$ Uri number $=$ Uri.parse$("$tel:$5551234")$; Intent $i=$ new Intent$($Intent$.$ACTION$\_$VIEW, number$)$; startActivity$($uri$)$;

d$.$

Uri number $=$ Uri.parse$("$tel:$5551234")$:

Intent $i=$ new Intent$($Intent$.$ACTION$\_$SEND, number$)$; startActivity$($i$)$;