The given expression is a division of two fractions. To divide fractions, we need to multiply the first fraction by the reciprocal of the second fraction. In this case, the reciprocal of -4/6 is -6/4 or -3/2. Therefore, -5/2 divided by -4/6 is equal to -5/2 multiplied by -3/2, which simplifies to 15/4 or 3 3/4. However, none of the given answer options match this result. Therefore, the correct answer is not available.