Where, in the application of section 4B to any provision of this Part, the same person would be entitled to take, in relation to the estate of an intestate -
(a) a share by virtue of a relationship with the intestate deduced in accordance with a determination under paragraph (a) of section 4B(1), and
(b) a share by virtue of a relationship with the intestate deduced in accordance with a determination under paragraph (b) of section 4B(1),
the person -
(i) shall take only one of the shares in the estate referred to in paragraphs (a) and (b), and
(ii) may elect to take either the share referred to in paragraph (a) or the share referred to in paragraph (b).