In the figure below, all surfaces are smooth, string is light and pulley is frictionless. Marks the correct statement(s) 

$5kg\Rightarrow$ $T=5a\to \left(1\right)$   
$10kg\Rightarrow$ $15-T=10a\to \left(2\right)$   
By solving $\left(1\right)\&\left(2\right)$  
$a=1m/s^2;T=5N$ 
Acceleration of block ‘C’ $a_c=0$  
Acceleration of both blocks A and B are in different directions but same in magnitude
Tension between block and wall is $2T\Rightarrow 10N$