If A is matrix of order `10xx15`, then each row of A contains

If A is a matrix of order 3xx 4 , then each row of matrix A contains elements :

If matrix A is of order 4 xx 3 , then each row of matrix A contains elements :

If A is a matrix of order 3 xx 4 , then each column of matrix A contains elements :

If AB=C where A is a matrix of order 2xx2 and C is a matrix of order 2xx5 , then the order of B is :

If matrix A is of order 3times4 ,then the each row of matrix A contains elements: (A) 4 (B) 12 (C) 3 (D) 7

If A is a matrix of order m xx n and R is a row of A, find order of R as a matrix.