In the arrangement shown in figure, $$a$$ represents the magnitude of acceleration of small blocks $$A$$ and $$B$$ while $$T$$ is the tension in the massless string passing over the frictionless and massless pulley. The sum of the masses of blocks $$A$$ and $$B$$ is constant. For this system, a linear relationship can be obtained between

A

$$a$$ and $$\frac{1}{T}$$

B

$$a$$ and $$T$$

C

$$a$$ and $$T^2$$

D

$$T$$ and $$a^2$$