[ROUGH SUB]Mnet's quiz and Music show throwback to BoA calling out to Jang Nara

The clip starts off with BoA appearing on a talk show, presumably Mnet's. The hosts then talk about BoA's achievements in Japan. After that they went into a segment called 'Calling right now'. BoA then called out to the person on the other end of the line. Then it was replied with a cute 'hello', which is Jang Nara! BoA then asked if she had eaten, with an accent. Then Jang Nara replied back, with an accent that she has eaten. She was then asked to introduce herself and she revealed herself to be Jang Nara. The host then asked Jang Nara how they knew each other.

The main show then asked the same question to the people in the studio.

The question asked was how did both of them know each other. 

Option 1: Same neighbourhood 

Option 2: Same hair shop 

Option 3: Their brothers are friends 

Option 4: Trainees from the same company 

Option 5: Knew each other during promotions

The answer isn't given in the clip, but the answer is that they were both trainees in the same company. I know this because I'm currently subbing a show where Jang Nara mentioned it so I will upload it in the future once I'm done!