FACTS:

On April 15, 1986, Bacani procured a life insurance contract for himself from Sun Life. He was issued a life insurance policy with double indemnity in case of accidental death. The designated beneficiary was his mother, Bernarda. On June 26, 1987, the insured died in a plane crash. Bernarda Bacani filed a claim with Sun Life, seeking the benefits of the insurance. 

Sun Life rejected the claim on the ground that the insured did not disclose material facts relevant to the issuance of the policy, thus rendering the contract of insurance voidable. A check representing the total premiums paid in the amount of P10,172.00 was attached to said letter. Sun Life discovered that 2 weeks prior to his application, Bacani was examined and confined at the Lung Center of the Philippines, where he was diagnosed for renal failure. During his confinement, the deceased was subjected to urinalysis, ultrasonography and hematology tests.  Sunlife claimed that the insured gave false statements in his application when he answered the following questions: