Most accurate and safe method to diagnose ble pregnancy at 6weeks-
Doppler assessment of fetal cardiac activity
USG for fetal cardiac activity
Urinary Beta-hCG determination
Per vaginal examination of uterine size corresponding to 6 weeks gestation
Answer- B. USG for fetal cardiac activityUSG for fetal cardiac activity:At 6 weeks it is routine to detect fetal cardiac activity by ultrasound5 1/2 Yz to 6 weeks is usually a very good time to detect either a fetal pole or even a fetal hea beat by vaginalultrasound.