Which of the following statements is used to create a histogram of 'step' type with 20 bins?

1. plt.hist(x, bins = 20, histtype = "barstacked")
2. plt.hist(x, bins=20)
3. plt.hist(x, bins=20, histtype="step")
4. plt.hist(x, bins=20, histtype=hist())

The part of chart which identifies different sets of data plotted on plot by using different colors is called:

1. legends
2. title
3. axes
4. figure

Which of the following plots makes it easy to visualize a trend in data over intervals of time.

1. Box plot
2. Histogram
3. Line Chart
4. Bar chart

COVID-19 patient analysis in the Mumbai region is to be plotted. The command used to give title to X-axis as "No. of Patients" in the graph is:

1. plt.show()
2. plt.plot("No. of Patients")
3. plt.xlabel("No. of Patients")
4. plt.title("No. of Patients")