does the MDBT42Q,2v04 have i2c interface?

meanwhile I will just try to see I can connect

// set up I2C
var i2c = new I2C();
i2c.setup({ scl : B6, sda: B7 });

what is B6\B7 - does it mean D6\D7 ?
and if I'm using serial also , can I connect it to D11 and D12?

Thanks ,