AIIMS 2017 Physics Tension in Strings MCQ Question

In a system of four blocks connected by strings and pulled by a force $F$, the tension in the strings can be determined by analyzing the forces acting on each block. For option B, $T_1 = \frac{1}{4}F$, $T_2 = \frac{1}{2}F$, and $T_3 = \frac{1}{2}F$ accurately reflects the distribution of force along the string, considering that the acceleration $a$ of the entire system is $a = \frac{F}{4m}$ (where $m$ is the mass of each block). The other options incorrectly calculate the tensions by either misapplying Newton's second law or failing to account for the cumulative effect of the blocks on the tension in the strings.