"19. When there are suspicious circumstances regarding the execution of the will, the onus is also on the propounder to explain them to the satisfaction of the court and only when such responsibility is discharged, the court would accept the will as genuine. Even where there are no such pleas, but circumstances give rise to doubt, it is on the propounder to satisfy the conscience of the court. Suspicious circumstances arise due to several reasons such as with regard to genuineness of the signature of the testator, the conditions of the testator’s mind, the dispositions made in the will being unnatural, improbable or unfair in the light of relevant circumstances or there might be other indications in the will to show that the testator’s mind was not free. In such a case, the court would naturally expect that all legitimate suspicion should be completely removed before the document is accepted as the last will of the testator."