  In this short note, we present a simple and elementary proof that meromorphic
conformal field theories (CFTs) have central charges of the form: $c=8N$ with
$N\in\mathbb{N}$ (the set of natural numbers) using the modular linear
differential equations (MLDEs) approach. We first set up the 1-character MLDE
for arbitrary value of the Wronskian index: $\ell$. From this we get the
general form of the meromorphic CFT's character. We then study its modular
transformations and the asymptotic value of it's Fourier coefficients -- using
Rademacher series -- to conclude that odd values of $\ell$ make the character
in-admissible implying that the central charge for admissible character has to
be a multiple of 8.
