The first seismograph was invented in
A. Germany by Albert Einstein.
B. China by zhang Heng.
C. Germany by Emmy Noether.
D. none of the above.

Hint It is known that seismograph is an instrument for measuring earthquake (seismic) waves. They are held in a very solid position, either on the bedrock or on a concrete base. The seismometer itself consists of a frame and a mass that can move relative to it. The terms seismograph and seismometer are often used interchangeably; however, whereas both devices may detect and measure seismic waves, only a seismograph possesses the capacity to record the phenomena. A record produced by a seismograph on a display screen or paper printout is called a seismogram.

Complete step by step answer
We can write that a seismometer is an instrument that responds to ground motions, such as caused by earthquakes, volcanic eruptions, and explosions. Seismometers are usually combined with a timing device and a recording device to form a seismograph.
A Chinese mathematician, named Zhang Heng, inverted and constructed the first seismograph in A.D. 132. He called it an "earthquake weathercock." Each of the eight dragons had a bronze ball in its mouth.
However, the main problem that must be solved in creating a seismograph is that when the ground shakes, so does the instrument. Therefore, most seismographs involve a large mass of some sort. A seismogram is a graph output by a seismograph. It is a record of the ground motion at a measuring station as a function of time. Seismograms typically record motions in three cartesian axes (x, y, and z), with the z axis perpendicular to the Earth's surface and the x- and y- axes parallel to the surface.

So, the correct answer is option B.

Note: We know that scientists can use them to determine the distance to an earthquake. Using at least three seismograms, they can locate the earthquake's epicentre. Scientists measure earthquake intensity in several ways. So far no one has found a way to predict earthquakes. During an earthquake, the seismometer remains still while the case around it moves with the ground shaking. Traditionally, the suspended mass was a pendulum, but most modern seismometers work electromagnetically. Seismograms are used to determine the location and magnitude of earthquakes. An earthquake's magnitude may be considered to vary as a function of the amount of energy released at the rupture point.