Option A - Joint and survivor annuity. - Upon the death of a retirant who elected option A, his or her reduced annuity shall be continued throughout the life of and paid to the beneficiary, having an insurable interest in the retirant's life, whom the retirant nominated by written designation duly executed and filed with the board of trustees prior to the effective date of his or her retirement; or
Option B - Modified joint and survivor annuity. - Upon the death of a retirant who elected option B, one half of his or her reduced annuity shall be continued throughout the life of and paid to the beneficiary, having an insurable interest in the retirant's life, whom the retirant nominated by written designation duly executed and filed with the board of trustees prior to the effective date of his or her retirement.
W. Va. Code § 5-10-24